<template>
  <view class="goods-item">
    <!-- 商品左侧图片区域 -->
    <view class="goods-item-left">
      <radio 
        :checked="goods.goods_state" 
        color="#c00000" 
        v-if="showRadio"
        @click="radioClickHandler">
      </radio>
      <image 
        :src="goods.goods_small_logo || defaultPic" 
        class="goods-pic" 
        mode="aspectFit">
      </image>
    </view>
    <!-- 商品右侧信息区域 -->
    <view class="goods-item-right">
      <!-- 商品标题 -->
      <view class="goods-name">
        {{goods.goods_name}}
      </view>
      <!-- 商品价格 -->
      <view class="goods-info-box">
        <view class="goods-price">
          ￥{{goods.goods_price | tofixed}}
        </view>
        <uni-number-box 
          :min="1" 
          :value="goods.goods_count"
          v-if="showNum"
          @change="numChangeHandler">
        </uni-number-box>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    props: {
      goods: {
        type: Object,
        default: {}
      },
      showRadio: {
        type: Boolean,
        // 如果外界没有指定 show-radio 
        // 属性的值, 则默认不展示radio组件
        default: false,
      },
      showNum:{
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        defaultPic: 'https://p7.itc.cn/images01/20230206/4205d3ae72be425cab5061e948d502ad.jpeg'
      };
    },
    filters:{
      // 将数字处理为带两位小数的数字
      tofixed(num){
        // Number()函数可以将任意类型的值转换为数字类型
        return Number(num).toFixed(2)
      }
    },
    methods:{
      radioClickHandler(){
        this.$emit('radio-change', {
          goods_id: this.goods.goods_id,
          goods_state: !this.goods.goods_state
        })
      },
      // 监听到了 NumberBox 组件数量变化的事件
      numChangeHandler(val){
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          // 保证val是一个数值 +val 或者 val-0;
          goods_count: val - 0
        })
      }
    }
  }
</script>

<style lang="scss">
  .goods-item {
    width: 750rpx;
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #f0f0f0;

    .goods-item-left {
      margin-right: 5px;
      display: flex;
      justify-content: space-between;
      align-items: center;

      .goods-pic {
        width: 100px;
        height: 100px;
        display: block;
      }
    }

    .goods-item-right {
      display: flex;
      flex: 1;
      flex-direction: column;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
      }

      .goods-info-box {
        display: flex;
        align-items: center;
        justify-content: space-between;
        .goods-price {
          color: #C00000;
          font-size: 16px;
        }
      }
    }
  }
</style>
